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"""This module contains an implementation of a stack that fits an online
container for video clips."""
import threading
from typing import Any, List
class Stack:
"""Create a stack object with a given maximum size."""
def __init__(self, max_size: int) -> None:
self._stack = []
self._max_size = max_size
self._lock = threading.Lock()
def put(self, item: Any) -> None:
"""Put an item into the stack."""
with self._lock:
self._stack.append(item)
if len(self._stack) > self._max_size:
del self._stack[0]
def get(self, size: int = -1) -> List[Any]:
"""Get an item from the stack."""
if size == -1:
size = self._max_size
return self._stack[-size:]
def __len__(self) -> int:
return len(self._stack)
def full(self) -> bool:
return len(self._stack) == self._max_size
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